Harm reduction flyers on nitazenes Release Heroin, fentanyl, and nitazenes More than 1200 vape vials laced with nitazene, a synthetic opioid 200 times more potent than morphine, were sold across Sydney, sparking Australia's first arrest over vapes spiked with the drug. Police Overdoses Linked To Illicit Vape Juice NSW Health Pathology Missouri health officials warn nitazenes, potent synthetic opioids, are hard to detect